VALLEY SPRINGS - Investigators with the Calaveras County Sheriff's Department knocked on doors at hundreds of homes Saturday while canvassing the area for clues that might lead them to the killer of 8-year-old Leila Fowler.

A sheriff's spokesman said investigators canvassed homes in the Valley Springs and Rancho Calaveras areas in hopes of finding new witnesses. Sgt. Chris Hewitt said investigators expected to find more people at their homes to answer questions on a Saturday.

Leila was found stabbed in her family's home April 27. Her 12-year-old brother described his sister's killer as being tall with long gray hair, but officials say a witness who said she also saw the man flee has since recanted and is no longer credible.